JPH04117921U - Direct acting guide device - Google Patents

Abstract

(57) [Summary] [Purpose] The preload to be applied can be easily adjusted. Prevents variations in preload amount between different direct-acting guide devices. [Structure] A moving body (2) that moves inside a linear guide rail (1) with a roughly U-shaped cross section is connected to two upper and lower moving blocks (11) (1).
2) Formed by. Left and right ball guide grooves (4A) (4B), ball return paths (6A) (6B), and reversal paths (7A) (7B) are formed in each moving block (11) (12). A spacer (13) is interposed between the upper moving block (11) and the lower moving block (12) to adjust the distance between both blocks (11) and (12).

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on linear motion, which is used for linear movement of machine tool tables, for example. Regarding the shaped guide device, in more detail, it is a linear guide rail with a substantially U-shaped cross section. , relates to a linear guide device comprising a moving body that moves within a guide rail.

0002 In this specification, forward and backward, left and right refer to the moving direction of the moving body. .

0003

[Conventional technology]

Conventionally, as this type of direct-acting guide device, the inside of the rising part on both sides of the guide rail was Two rows of upper and lower ball guide grooves are formed on both sides of the surface and the moving body, respectively. A ball outward path is formed by the ball guide grooves, and each ball outward path in the moving body is A ball return path is formed on the inside in the left-right direction, and the end of the ball outward path and the end of the ball return path are are connected by reversing paths formed at both the front and rear ends of the moving body, forming a ball circulation path. The ball circulation path of the moving body has a plurality of balls rolling between the moving body and the guide rail. balls were enclosed and preload was applied by changing the ball size. is known (see Utility Model Application Publication No. 2-25723).

0004

[Problem that the idea aims to solve]

However, with conventional direct-acting guide devices, it takes time and effort to adjust the applied preload. There is the problem of cost. In addition, if multiple direct-acting guide devices are made, each direct-acting guide device can be There is a problem in that the amount of preload applied by the dynamic guide device varies.

[0005] The purpose of this invention is to provide a direct-acting guide device that solves the above problems. Ru.

[0006]

[Means to solve the problem] The direct-acting guide device based on this idea is A linear guide rail with a substantially U-shaped cross section and a moving object that moves within the guide rail. The inner surface of the rising part on both the left and right sides of the guide rail and the left and right sides of the moving body Two rows of ball guide grooves are formed on each surface, upper and lower, and these ball guide grooves are A ball outward path is formed, and the ball is placed inside the left and right direction of each ball outward path in the moving body. A ball return path is formed, and the end of the ball forward path and the end of the ball return path are at both front and rear ends of the moving body. A ball circulation path is formed by connecting the reversing path formed in the part, and the ball circulation path of the moving body is A plurality of balls are enclosed in the rail circulation path and roll between the moving body and the guide rail. In the direct-acting guide device, The moving body is formed by two upper and lower moving blocks, and each moving block has left and right A ball guide groove, ball return path and reversal path are formed, and the upper moving block and lower A spacer is interposed between the side moving block and the distance between both blocks. This is what is being done.

[0007]

[Effect]

The moving body is formed by two upper and lower moving blocks, and each moving block has left and right A ball guide groove, ball return path and reversal path are formed, and the upper moving block and lower A spacer is interposed between the side moving block and the distance between both blocks. The amount of preload applied can be easily changed by changing the thickness of the spacer. Can be adjusted. Moreover, the dimensional accuracy of the spacer thickness is equal to the dimensional accuracy of the ball. Since it can be easily increased compared to the This prevents variations in the amount of preload applied to each direct-acting guide device even when .

[0008]

【Example】

An embodiment of this invention will be described below with reference to the drawings.

[0009] 1 to 5 show the configuration of the linear guide device in an assembled state. In addition, FIGS. 6 to 9 The configuration of each member of the upper moving block of the moving body is shown.

0010 In FIGS. 1 to 5, the linear guide device is a linear guide rail with a substantially U-shaped cross section. It consists of a guide rail (1) and a moving object (2) that moves within the guide rail (1).

[0011] There are two rows of upper and lower rows on the inner surface of the rising parts (1a) on both the left and right sides of the guide rail (1). Ball guide grooves (3A) (3B) are formed. on both the left and right sides of the moving object (2). Two rows of ball guides (upper and lower) corresponding to the ball guide grooves (3A) and (3B) of the guide rail (1), respectively. Id grooves (4A) (4B) are formed. Ball guide groove (3A) (3B) of guide rail (1) and the corresponding ball guide grooves (4A) (4B) of the moving body (2) to guide the ball outward (5A). (5B) is formed. Each ball guide groove (3A) (3B) (4A) (4B) It is formed by two arcuate surfaces with a radius of curvature larger than the diameter of (9).

0012 Inner side in the left and right direction than the left and right ball guide grooves (4A) (4B) in the moving body (2). Two rows of hole-shaped ball return paths (6A) and (6B) are formed in the upper and lower rows, respectively. Then, each ball The end of the path (5A) (5B) and the end of each ball return path (6A) (6B) are at both the front and rear ends of the moving body (2). Two upper and lower endless balls are connected by the two upper and lower reversing paths (7A) (7B) formed. Circulation paths (8A) (8B) are formed. Each ball circulation path (8A) (8B) has multiple balls. (9) is included. The ball (9) hits both ball gates on the ball's outward path (5A) (5B). The grooves are made to contact the groove surfaces of (3A) (3B) and (4A) (4B) at one point each. There is. To the groove surface of both ball guide grooves (3A) (4A) of the ball (9) on the upper ball outward path (5A) A straight line connecting the contact points of and both ball guide grooves of the ball (9) on the lower ball forward path (5B) The straight line connecting the contact points of (3B) and (4B) to the groove surface is the inside of the ball's outward path (5A) and (5B) in the left and right direction. , or intersect at a predetermined angle at one point on the outside.

[0013] The moving body (2) is formed by two upper and lower moving blocks (11) and (12). upper side between the lower moving block (11) and the lower moving block (12), the distance between both parts (11) and (12) is A spacer (13) is interposed to adjust the distance.

[0014] The upper moving block (11) has end cap parts (14) at both front and rear ends, and the remaining side It consists of an intermediate portion (15) having a generally inverted U-shaped cross section and a retainer (16). As shown in Figure 6, Two arcuate recesses (17) on the left and right sides are formed on the inward surface of the head cap portion (14) in the front and back direction. has been completed. The left and right outer parts of the recess (17) are located on the left side of the end cap part (14). It opens on both right sides. As shown in Figure 7, the leg-like parts on both the left and right sides of the middle part (15) A ball guide groove (4A) is formed in the portion (15a).

[0015] The retainer (16) is formed by two upper and lower members (18) and (19). It is shown in Figure 8. Before the lower member (19) is fitted between the left and right leg-shaped parts (15a) of the middle part (15), The central linear part (19a) extending rearward and the left and right rising parts of the guide rail (1) Upper ball outward path (5A) between (1a) and both left and right sides of the upper moving block (11) The left and right straight parts (19b) located below the center straight part (19a) and the left The ends of the straight parts (19b) on both right sides are connected together and the end cap part (19b) is connected together. 4) consists of an arcuate portion (19c) located within the recess (17). Central straight part (19a) Two rows of arcuate grooves (21) on the left and right sides are formed on the upper surface of. Straight parts on both left and right sides (1 9b), each of which has an arcuate groove (22) formed on its upper surface. Arc-shaped part (19c ) has an arcuate groove (21) on one side of the central straight part (19a) and a straight groove on either the left or right side. One arcuate groove (23) is formed to connect the arcuate groove (22) of the linear portion (19b). Ru.

[0016] As shown in FIG. 9, the upper member (18) of the retainer (16) has both left and right leg-shaped portions of the intermediate portion (15). (15a) A straight part (18a) extending in the front and back direction inserted between the parts (15a) and the straight part (18a) is integrally formed on both the front and rear ends of the end cap portion (14) and in the recess (17) It consists of two circular arc-shaped parts (18b) on the left and right located at . The tip of the arc-shaped part (18b) is The ball protrudes from the openings on both left and right sides of the end cap portion (14) of the recess (17). It faces the road (5A). The lower surface of the straight part (18a) has an arcuate groove (21) in the lower member (19). Two rows of arcuate grooves (25) on the left and right are formed corresponding to the grooves. Bottom surface of arc-shaped part (18b) is formed with one arcuate groove (26) corresponding to the arcuate groove (23) of the lower member (19). . Then, the arcuate grooves (25) (21) of the straight parts (18a) (19a) of both the upper and lower members (18) (19) A ball return path (6A) is formed, and the arcuate grooves (26) and (23) of the arcuate portions (18b) and (19c) A reversal path (7A) is formed. The retainer (16) has both left and right ends facing the bottom surface of the middle part (15). It is fitted into the recess (27) formed at both the front and rear ends of and is screwed to the middle part (15). It is fixed by a fixed fixing plate (28).

[0017] The lower moving block (12) of the moving body (2) is arranged with the upper moving block (11) upside down. The same components are given the same reference numerals and their explanation will be omitted.

[0018] Upper moving block (11), lower moving block (12) and spacer (1) of moving body (2) 3) is removably fixed by screw means (not shown). And space It is possible to adjust the amount of preload applied by changing the thickness of the service (13). Ru.

[0019] In the above embodiment, each ball guide groove (3A) forming the ball outward path (5A) (5B) (3B)(4A)(4B) are two arcuate surfaces with a radius of curvature larger than the diameter of the ball (9). However, instead of this, each ball guide groove (3A) (3B) (4A) (4B) has two planes, The ball (9) is formed by one arcuate surface with a radius of curvature larger than the diameter of the ball (9). You can stay there.

[0020]

[Effect of the idea]

According to the direct-acting guide device of this invention, the thickness of the spacer can be changed as described above. By doing so, the amount of preload to be applied can be easily adjusted. Moreover, multiple Even if a direct-acting guide device is made, the amount of preload applied to each direct-acting guide device is It is possible to prevent variations from occurring.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway horizontal cross-sectional view (cross-sectional view taken along line II in FIG. 3) of a direct-acting guide device according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1.

FIG. 5 is a sectional view taken along the line V-V in FIG. 1;

FIG. 6 is a perspective view of an end cap in the upper moving block of the moving body.

FIG. 7 is an exploded perspective view of an intermediate portion of the upper moving block.

FIG. 8 is a perspective view of the lower member of the retainer in the upper moving block.

FIG. 9 is a perspective view of the upper member of the retainer in the upper moving block.

[Explanation of symbols]

1 Guide rail 1a Rising part 2 Mobile object 3A Ball guide groove 3B Ball guide groove 4A Ball guide groove 4B Ball guide groove 5A Ball outward route 5B Ball outward route 6A Ball return 6B Ball return route 7A Reverse path 7B Reverse road 8A Ball circulation path 8B Ball circulation path 9 balls 11 Upper moving block 12 Lower moving block 13 Spacer

Claims (1)

[Scope of utility model registration request] Claim 1: Consists of a linear guide rail with a substantially U-shaped cross section and a movable body that moves within the guide rail, and has upper and lower two grooves on the inner surface of the rising portion on both left and right sides of the guide rail and on both left and right sides of the movable body. A row of ball guide grooves are formed, ball outward paths are formed by these ball guide grooves, and a ball return path is formed inside the left and right direction of each ball outward path in the moving body, and an end of the ball outward path and an end of the ball return path are formed. are connected by reversing paths formed at both front and rear ends of the movable body to form a ball circulation path, and a plurality of balls rolling between the movable body and the guide rail are enclosed in the ball circulation path of the movable body. In the linear guide device, the moving body is formed by two upper and lower moving blocks, and each moving block has left and right ball guide grooves, a ball returning path, and a reversing path, and the upper moving block and the lower moving block A direct-acting guide device in which a spacer is interposed between the two blocks to adjust the distance between the two blocks.